Apparatus for applying and maintaining pressure periodically



Jan. 1, 1929." 1,697,740

c. TURNER APPARATUS FOR APPLYING AND MAINTAINING PRESSURE PERIODICALLY Filed Nov. 6, 1926 2 Sheets-Sheet l Z7'z were, Z 9" Cyzarlsa 2247-72 6 Wrvae% Jan. 1, 1929. 1,697,740

. -c. TURNER APPARATUS FOR APPLYING AND MAINTAINING PRESSURE PERIODICALLY Filed NOV. 6, 1926 2 Sheets-Sheet 2 1521963 Far czar'zeesji r): 6 Y

' Patented Jan. 1, 1%29. r

CHABLES ew ANQHEs a mam.

ssam-mus son LXIr-IG. aazmrela ae PRE URE rEEioD caL Application filed November e, 192e, serial Ne,'146,P-30, ant-a Great Britain November 18', 1e35,

This inventionrelates to an improved a-pparatus for applying-and maintaining pres sure periodically, i'or use, tor example, in

opening and closing firmly a valve in a shale distillation system, wherein'it is desired to op} crate aval've periodically; or in shearing machines, die-stamping, embossing and similar machineswherein periodic pressure is desired.

According to the invention theapparatus comprises a rock shait,a-lever arm'rigi'dly connected to the rock shaft connectedto the valve or other part tobe actuated, a member loosely mounted on the I rock shaftand connected through a yieldable connection to the arm rigid on the took shaft and a rotary cam adjacent to the rock shaft and adapted to engagethe looselymounted member to rotate the rock shaft through-said arm and yieldable connection and thus actu' ate the valve or other part; and means for producing and maintaining an augmented pressure on such part during a certain period of the rotation of the cam.

In a suitable construction the shaft having a the rigid lever for connection to the part to be actuatedcarries an arm which is yieldingly connected by one end to a plate or the like loose on the'shaft. The end or the plate remote fromthe point of connection to the arm carries a pivoted tripod plate on which are mounted two rollers the movement of the tripod beinglimited by suitable stops.

lhe cam is arranged on a rotary shaft parallel to the first-named shaft and is so shaped that, onro-tation of'said rotaryshatt, said cam engages the free end of the plate, which is suitably-shaped, turning the plate on the rock shaft connected to the part to be actuated. The cam turns the plate into an approximately horizontal position to move the part to be actuated, and the cam in itsv further movement successively Jcngagcs the rollers to produce an augmented pressure to hold said part in the'positioninto' which it has been moved, the yielding-connection oi the plateto its shaft enabling this to be done. Continued movement of the cam causes the pressure to be removed and the cam leaves aiid adapted tobe pi 111g a cam :t'ace shaped as of the cam the sired position and, pressure applied thereto automatically and at any desiredintervals;

To enablethe invention to be fully under stood, it will now be described by reference to the accompanying drawings in'which I 1 1g. 1 1s a side elevation of one embodithe several stages of operation ofthe appa'- V ratus'and Fig. 6 is an end view at aright angle to p As in Fig. 1-; the part to be actuated (shown as valve 6) is carried by-a lever rigidly cons nectedtoa shaft 7 ,an'dfis adapted to bemoved :into] the desired position when the shaft 7 is retated through90 in a, contra clock-wise. direct-ion. Loosely -mountedi on the shaft? is a pair of plates 8, and an arm 9 has one end rigidly. secured to the-shaft leetween the plates. The other end of the arin is yieldingly connectdto the plates 8 by eye-bOltlOpassing through a block 11, pivoted between the plates 8, a coiled spring 12 being arranged Within the block between a shoulder on the eye bolt and a bush 13" screwed into the block 11. Thespring-12,1 9

therefore; is free to slide on the bolt 1O as shown and lIQDClS tO lIOlCl the ends of the plates 8 with which it is associated-away from the outer end ofthe arm 9. Bc'tweenthe .free

ends of the plates 8 a tripod 14. comprising a pair of plates is pivoted on a p'i'n 15 fixed in the plates 8." Between the two platesfof the tripod'le a pair ofrollers'lfig lZ-are' pivotally mounted, movement or the tripod being limited by the stops 18, 19 extending between the plates 8. The ends of the plates 55, adjas cent to the tripod 1 L are'inclined to the side edges of said plates for engagement withl'a to a sh aft 22 parallel to the rock shaft 7. Obviously a single platemay be substituted for thepair of plates 8. i

air of rollers 20 mounted ones arm srhav 1 shown and fixed I The operation of the above described apparatus is as follows the position shown in 7 With the parts in "Fig. 1, the valve 6 orsother part to be actuated is in one positionand, if the shatt=22 is'rotated in a clockwise direction, the rolls ers 20' of the arm 21 engagethe "shap'edenjds of the plates 8 movingtheplates into the'position shown in Fig. 2, consequently rotating the shaft 7 'throug ithe armt and moving the desired position.

the valve 6 or other part to be actuated into Continued movement of the arm 21 1s deslgned to apply pressure to holdthe actuated part in said position.

As shown in Fig.2, thetripod 14 haslbeen moved by gravity into contact with the stop 18 andthe cam face of the arm 21 engages the roller 16. Further movement of the arm 21 causes the portion A ofthe cam face, which isan arc struck from the centre of shaft 22, to' slide over the ro'll'er 16 until i the toe of the cam face rests on the roller 17 (Fig. The toe ofthecam face is formed with an inclined portion Band, as the arm 21 continues to move, pressure 1S exerted on I tween the plates 8 and arm 9 and rocks the shaft 7 and consequently the valve 6 or other part to .be actuated is'pressed firmly into the position into which it has been moved. Continned movement of the. arm 21 causes its 'camface to reach the position shown in Fig; 5 in which the'tripod 14 rests against the stop .19 and the torsion on the shaft 7. is released so that, as the cam face of the arm 21 leaves the roller 17, no jolt occurs and the valve 6 or other'aetua-ted-part is free to move into its initial position by the sole action of gravity or by the weight of material resting upon it. 7 It will be understood that, since the weight of the arm 9, sleevejll and associated parts are greater than that of thetripod 14, when the scam face .of the arm 21'leaves the plates 8, the parts return automatically to the position shown in Fig. 1;

1 'The'arm 21 may be adjustablymounted on theshaft 22 and rotated at any desired speed,

either continuously or intermittently, accordmg to the desired operation of the actuated part. I r 'For example, where the apparatus is to be used ;f or.actuating the valve of-aretort, the valve voperating gear will be arranged outside theretort and the shaft 7 may, if desired be sultably'operated outside the re- :tort independently of the cam mechanism,

by hand or other-wise when it is desired to open or close the valve.

Obviously the invention may be applied for operating a series of valves in a retort system; In the example illustrate'd,ithe valve to be operated upon is shown as directly and rig- "idly connected to-the shaft 7, butobviously the apparatus may be arranged to operate upon a valve or the like not directly or positively connected to the shaft. Y Iclaim: 'j r '1: Apparatus. for applying and maintain- 111g pressure periodically for the purposes described, comprising a rock-shaft, a lever, rigidly connected to said shaft and adapted to be connected to a part to be operated, a member loosely mounted on said shaft, .7 a second member mounted to rock on said loosely mounted member and having portions projectable during its rocking movement beyond an edge of said loosely mounted member, an arlnrigid on saidshaft, a yieldable'connection between said loosely mounted member and said arm, and a rotary c'ain having means adapted during a part of its rotation to engage one end of the loosely mounted member to rock the shaltand move the part to be op: erated into desired positiomsaid camhaving portions adapted during further rotation; of the cam to successively engage the projectable portions of said rocking member and exert an augmented pressure on the part to be operat-ed through said loosely mounted member a and yieldable connection. 1 2. Apparatus according to clamil-wherein stops arecarrled by the loosely mounted memher to engage and limit the rocking movementof therocking member in both directions durs said rocking member. I I v .3. Apparatus for applying and maintains .ing pressure periodically for the purposesdescribed, comprising a rock-shaft, a lever rigmg engagement of the cam with portions of idly connected to said shaft'and adaptedto be connectedto a part to be operated, a member loosely mountedon said shaft, an arm rigid on said shaft, a hollow block carried by the loosely mounted member, means longitudi'e nally adjustable in said hollow member, and a spring in said hollow memberhaving its'opposite ends bearing against said longitudinal- 1y adjustable member and the arm, and a rotary cam adapted to engage the loosely mountedmember to rock said shaft and move the part to be operated into desired position a'nd'thereafter exert an augmented pressure on the part to be operated through said hollow block, adjust-ablemeans and sprin 4. Apparatus for applying and maintaining pressure periodically,comprising a rockshaft, a pair of spaced members loosely mounted between their endson said shaft, a member pivoted between 7 said plates, j said member having parts arranged in triangular relation to its pivot andfadapted, respectively, when said member is rocked in oppositedirections on its pivot, to project beyond the edges of said spaced members, 'alever secured to said shaft and adapted, when said shaft is rocked in one direction, to exert pressure on a part to be actuated, an arm secured to said shaft, yieldable means between said arm and said spaced members, and a rotatable cam adapted in its rotation to first engage and rock said spaced members and exert pressure 1 through said yieldable means, said arm, said projecting parts of said pivoted member and exert further pressure through said yieldable means, said lever, said rock-shaft and said arm upon the part to be actuated.

5. Apparatus according to claim l wherein the member pivoted between the spaced memhers is triangular in shape and the parts adapted to project beyond the edges of the spaced members comprise antii'rictionmembers.

6. Apparatus for applying and maintaining pressure periodically to a part to be tuatcd, comprising a rock-shaft, a pair of spaced plates loosely mounted between their ends on said shaft, each of said plates having one. of its ends inclined with relation to its side edges, a member pivoted between said spaced plates on an axis parallel to said rock shaft and having parts arranged in triangular relation to its pivot adapted, respectively, to project beyond the edges of said spaced plates when said member is rocked in opposite d1rections,a pressure applylng member secured to said shaft and adapted, when said shaft is rocked in one direction, to apply pressure to a part to be operated, an arm having parallel to said rock-shaft, and anti-frictionmembers and a cam face carried by said rotatable arm, said antii'riction members adapted during part of the rotation of said rotatable arm to engage the inclined ends of said spaced plates and said cam face adapted during further rotation of said arm to successively engage the projecting parts of said pivoted member.

7 In testimony whereof I have signed my name to this specification.

CHARLES TURNER. 

